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2008

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Articles 331 - 360 of 997

Full-Text Articles in Civil and Environmental Engineering

Lessons Learned From Two Investigation Cases Of Ground Distresses Due To Deep Excavation In Filled Ground, Liew Shaw-Shong, Khoo Chee-Min Aug 2008

Lessons Learned From Two Investigation Cases Of Ground Distresses Due To Deep Excavation In Filled Ground, Liew Shaw-Shong, Khoo Chee-Min

International Conference on Case Histories in Geotechnical Engineering

Ground distresses such as ground settlement/subsidence, lateral movement, cracking, etc, are usually the main concern for any excavation project. The contributory factors of ground distresses could be from various aspects and sometimes are similar in nature. This paper presents the processes of geotechnical investigation, remedial design, construction monitoring for two case histories of ground distresses occurring on a retained platform due to excavation in filled ground. Desk study, site inspection and subsurface exploration have been deployed to reveal the evidences and identify probable causes of the distresses. Back analyses utilizing finite element computer program “Plaxis” proved useful to reveal the …

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Groundwater Lowering In Deep Excavation (Case Study: Foundation Excavation Of Shahid Madani Dam), A. H. Sadeghpour, A. Ghanbari, M. Fadaee Aug 2008

Groundwater Lowering In Deep Excavation (Case Study: Foundation Excavation Of Shahid Madani Dam), A. H. Sadeghpour, A. Ghanbari, M. Fadaee

International Conference on Case Histories in Geotechnical Engineering

In many big civil constructions, deep excavation is an essential part of project and groundwater control in excavation process is the prominent tasks. In this paper while mentioning the risks of deep excavation, the solutions of underground water control have been explained and different methods of groundwater control in regard to financial conditions, different soil condition and various depths have been investigated. Groundwater control in foundation excavation of Shahid Madani Dam as a case study is presented. Depth of foundation excavation was about 50 meters in tight valley and excavation was performed under groundwater table. This excavation is one of …

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Numerical Analysis Of Algonquin Geogrid Reinforced Soil Retaining Wall Under Construction And Earthquake Loading, Javad Safadoust, Golam Moradi Aug 2008

Numerical Analysis Of Algonquin Geogrid Reinforced Soil Retaining Wall Under Construction And Earthquake Loading, Javad Safadoust, Golam Moradi

International Conference on Case Histories in Geotechnical Engineering

In this paper the finite element procedure was used to investigate the behavior of 6.1m high Algonquin geogrid reinforced soil retaining wall using the computer program Plaxis under construction and earthquake loading. Algonquin wall was constructed in Algonquin, Illinois by FHWA (Federal Highway Administration).The performance of the wall was measured during the construction using inclinometers and surface optical surveys for deflection, and strain gauges for reinforcement strain distribution. In order to investigate the effect of earthquake loading on the wall performance, the 1994 Northridge earthquake motion was applied as input ground motion in the dynamic analysis. The lateral displacement, reinforcement …

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Online Database Of Deep Excavation Performance And Prediction, Dimitrios C. Konstantakos Aug 2008

Online Database Of Deep Excavation Performance And Prediction, Dimitrios C. Konstantakos

International Conference on Case Histories in Geotechnical Engineering

Deep excavations can comprise one of the most challenging design and construction geotechnical problems. Many factors affect their performance including soil strength, ground-water, building surcharges, construction methods, and construction techniques. Engineers are confounded with the complex problem of predicting behavior while producing a safe and economical design. Typical parameters of interest are design wall moments, bracing forces, wall displacements, and ground or building settlements. Many authors have compiled case histories that quantify maximum observed displacements in various publications. Often, these publications include benchmarking of observed behavior otherwise known as Class “C” predictions. Few authors have compiled Class “A” predictions where …

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The Selection Of An Earth Retention System At The Boston's Central Artery/Tunnel Project, Shahriyar Mojahed, Mark French Aug 2008

The Selection Of An Earth Retention System At The Boston's Central Artery/Tunnel Project, Shahriyar Mojahed, Mark French

International Conference on Case Histories in Geotechnical Engineering

The Central Artery/Tunnel (CA/T) Project also known as "Big Dig" has been the largest public work ever attempted in the American history. The selection of an appropriate earth retaining system for elimination of ground movement and preservation of adjacent structures was a key constructability challenge for construction practitioners at the CA/T. This paper explains the critical factors which had an effect on the selection of the Soldier Pile-Tremie Concrete (SPTC) slurry walls at the project. The advantageous of this system has been illustrated for other projects that face similar challenging conditions.

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Case History Compilation Of Engineering Properties Of Common Rocks In Maharashtra, India, For Database (1982-2002), M. S. Mundhe, V. B. Pandhare, N. M. Methekar, Shriram R. Vaijapurkar Aug 2008

Case History Compilation Of Engineering Properties Of Common Rocks In Maharashtra, India, For Database (1982-2002), M. S. Mundhe, V. B. Pandhare, N. M. Methekar, Shriram R. Vaijapurkar

International Conference on Case Histories in Geotechnical Engineering

Rock samples are received from various project sites for testing at MERI. These rock samples were tested and test results were communicated to the project in charge from time to time. After carrying out tests to determine different engineering properties of various types of commonly available rocks, mostly for irrigation structures in Maharashtra, lot of historical data is available. It was felt that, this data of results may be compiled digitally in database software (M. S. Access) and analyzed suitably for use in design and construction of irrigation and other important structures in future. The results of about 1920 Rock …

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Case History Of Tunnelling Through Claystone, R. K. Goel, Anil Swarup Aug 2008

Case History Of Tunnelling Through Claystone, R. K. Goel, Anil Swarup

International Conference on Case Histories in Geotechnical Engineering

A broad gauge railway line is being constructed by Indian Railways in Himalaya. The total route length is 342kms, out of which about 100km is in tunnels. The tunnelling problem while excavating the Tunnel no.1 of Udhampur-Katra section and being faced currently is discussed in the paper. The D-shaped tunnel passes through thickly bedded, moderately soft, sparsely jointed sandstone, sheared claystones, siltstones and overburden comprising boulders/pebbles in sandy/silty matrix. The support pressure and the deformation were monitored to study the performance of the support system. Due to the presence of swelling minerals in claystone and weak & highly jointed rock …

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Construction Of Express Subway Line Eole In Paris, Verya Nasri, Philippe Fauvel Aug 2008

Construction Of Express Subway Line Eole In Paris, Verya Nasri, Philippe Fauvel

International Conference on Case Histories in Geotechnical Engineering

EOLE is the line E of the Paris express subway network serving two new stations: Magenta and Haussmann, located in the capital’s most important business districts. The project is designed to provide relief to the current network which had reached saturation in the East-West direction where the public resides in the East and work in the West. With its subterraneous network of connections and passageways, EOLE is a vast underground complex, a place of constant exchange with the urban environment, set in the very heart of Paris. Conquering the underground, supporting the city, domesticating space, architectonising concrete, bringing light under …

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Design And Construction Of Drilled Shafts In Karst Environments Of Florida, Amy L. Guisinger, Ching L. Kuo, Teresa Puckett Aug 2008

Design And Construction Of Drilled Shafts In Karst Environments Of Florida, Amy L. Guisinger, Ching L. Kuo, Teresa Puckett

International Conference on Case Histories in Geotechnical Engineering

Drilled shafts have been widely used as bridge foundation alternatives for more than a decade in Florida. The majority of the drilled shafts are designed to embed into the underlying limestone. However, many unforeseen conditions have been encountered during the construction of drilled shafts due to karst environments, especially in the Tampa Bay area where sinkhole occurrences are common. This paper presents a case history of the design and construction of drilled shaft foundations for the I-4/I-275 Downtown Interchange in Tampa, Florida. A two-phase procedure utilized by the Florida Department of Transportation (FDOT) was adopted to minimize the impact of …

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Artificial Ground Freezing In Geotechnical Engineering, Dong K. Chang, Hugh S. Lacy Aug 2008

Artificial Ground Freezing In Geotechnical Engineering, Dong K. Chang, Hugh S. Lacy

International Conference on Case Histories in Geotechnical Engineering

Artificial ground freezing converts soil pore water to ice. The resulting frozen ground is relatively strong and impervious. It has been used in many geotechnical engineering applications, especially difficult and unusual construction projects. Its applications have been widely used in temporary excavation supports for deep circular shaft construction. Recently, its applications have expanded to provide temporary support for deep open cut excavations and ground stabilization for tunneling. This paper describes artificial ground freezing technology, discusses its engineering properties, illustrates its applications in geotechnical engineering, and concludes with a brief summary of various artificial ground freezing project experiences. Design and performance …

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Practical Lessons From Failure Of A Reinforced Soil Retaining Wall On A Major Highway, P. Jagannatha Rao Aug 2008

Practical Lessons From Failure Of A Reinforced Soil Retaining Wall On A Major Highway, P. Jagannatha Rao

International Conference on Case Histories in Geotechnical Engineering

A “Reinforced Soil Retaining Wall” (RSR) wall of 10.5m height collapsed about 5 years after construction. HDPE geogrids were used as reinforcement. The facia panels suffered outward movements during construction and the deformations continued to increase. A 16m long stretch of the RSR wall failed and the failure wedge cut through four layers of reinforcement. The paper analyses the role of different factors in causing the failure. Tension tests were carried out on the geogrids exhumed from the failed zone. A significant loss in the strength of these grids was found which may be attributed to the high ambient temperatures …

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Harmony Of Retaining Systems To Various Local Subsoil Conditions – A Case Study, H. Bora Keskin, H. Turan Durgunoglu, Selim Ikiz Aug 2008

Harmony Of Retaining Systems To Various Local Subsoil Conditions – A Case Study, H. Bora Keskin, H. Turan Durgunoglu, Selim Ikiz

International Conference on Case Histories in Geotechnical Engineering

A case study for the utilization of various retaining systems for different subsoil and groundwater conditions encountered within a given site is presented in this paper. The project is known as “BJK Fulya Complex”, covering approximately 160,000 m2 floor area. It is located at a very prestigious district of the city, therefore maximum underground space gain were desired. As a result nearly 20 m of excavation is planned to be performed partly under groundwater. Due to unique topography and geology of the site, subsoil and groundwater conditions at various faces of the excavation differ considerably. Because of the complicated …

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Characterization Of The Shear-Induced Potential (Sip) In Clay And The Application To Landslide Sites, Koichi Nakagawa, Shigenobu Yamada, Isamu Tsuka Aug 2008

Characterization Of The Shear-Induced Potential (Sip) In Clay And The Application To Landslide Sites, Koichi Nakagawa, Shigenobu Yamada, Isamu Tsuka

International Conference on Case Histories in Geotechnical Engineering

Electrical polarizations were observed in common fine soil aggregates in shear deformation tests and simulations conducted in a laboratory. This electric potential is called Shear-induced Potential (SIP). The SIP can be interpreted as the physicochemical interaction between the surface of clay particles and interstitial water by the kinetics of the electric double layer. The SIP could not be detected in a remolded craft clay sample, which was possibly treated with electrically non-dipole oil. In the laboratory, a plane strain test under the un-drained condition was carried out to reveal the characteristics of the polarization accompanying the shear deformation. Gouges from …

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Case Study On The Influence Of Transpiration On The Ground Behaviour, Behzad Fatahi, Buddhima Indraratna, Hadi Khabbaz Aug 2008

Case Study On The Influence Of Transpiration On The Ground Behaviour, Behzad Fatahi, Buddhima Indraratna, Hadi Khabbaz

International Conference on Case Histories in Geotechnical Engineering

Bioengineering including native vegetation is an ancient method of improving the stability of slopes. In modern railway engineering, this technique is re-captured for increasing the soil stiffness and shear strength of sub-grade beneath rail tracks. A mathematical model for the rate of root water uptake has been developed considering ground conditions, type of vegetation and climatic parameters. The three independent features in the root water uptake model considered in detail are soil suction, root distribution, and potential transpiration. In order to establish a rigorous analysis for estimating the actual transpiration or root water uptake, the above mentioned factors have been …

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Compressive Strength Of Repaired Road By Recycling Technique Of Pavement Materials, Runglawan Rachan, Suksun Horpibulsuk Aug 2008

Compressive Strength Of Repaired Road By Recycling Technique Of Pavement Materials, Runglawan Rachan, Suksun Horpibulsuk

International Conference on Case Histories in Geotechnical Engineering

The Department of Highways, Thailand, has used the pavement recycling technique to restore damaged pavement since 1965. This technique is economical because cement is readily available at reasonable cost in Thailand. From this study, it is found that the field roller-compacted strength, qufr is lower than the laboratory strength, qul under the same dry unit weight, soil-water/cement ratio and curing time due to several field factors. The ratio qufr/qul varies from 50 to 100%. Non-uniformity in mixing soil with cement is realized by the ratio of field hand-compacted strength to laboratory strength, qufh/q …

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A Combination Of Artificial Ground Freezing And Grouting For The Excavation Of A Large Size Tunnel Below Groundwater, Vittorio Manassero, Giuseppe Di Salvo, Fabio Giannelli, Giuseppe Colombo Aug 2008

A Combination Of Artificial Ground Freezing And Grouting For The Excavation Of A Large Size Tunnel Below Groundwater, Vittorio Manassero, Giuseppe Di Salvo, Fabio Giannelli, Giuseppe Colombo

International Conference on Case Histories in Geotechnical Engineering

Within the Metro Line 1 extension project in Napoli (Italy), the service tunnel at Toledo station was one of the most critical sections of the project. The 13m wide, 17m high, 40m long tunnel is located downtown under a deeply urbanized area. It was excavated starting from an access shaft and from this tunnel four platform tunnels are under excavation. The geology of the site is characterized by volcanic soils: loose pozzolana silty sand and tuff. The underground works were carried out under a hydrostatic head of 27 m. In order to allow a safe and substantially dry excavation, soil/rock …

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Application Of Numerical Modelling To Study The Efficiency Of Roof Bolting Pattern In East 1 Main Gate Of Tabas Coal Mine, S. Taghipoor Aug 2008

Application Of Numerical Modelling To Study The Efficiency Of Roof Bolting Pattern In East 1 Main Gate Of Tabas Coal Mine, S. Taghipoor

International Conference on Case Histories in Geotechnical Engineering

Tabas mechanized underground coal mine, locating in mid eastern of Iran, has been designed to produce 1.5 million tone coal annually. To start driving the first (East 1) panel's main gate and tail gate, a 7+6 pattern of 2.4 m roof bolts was considered to be applied in both gates together with 4 and 3 side bolts at left and right ribs, respectively. In this paper, 2D numerical modelling using FLAC program is implemented to assess the efficiency of the roof bolting pattern in the east 1 main gate of the mine. The output of the modelling, in the form …

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Dynamic Geotechnical Characterization Of San Giuliano Di Puglia Seismic Area, Antonio Cavallaro, Salvatore Grasso, Michele Maugeri Aug 2008

Dynamic Geotechnical Characterization Of San Giuliano Di Puglia Seismic Area, Antonio Cavallaro, Salvatore Grasso, Michele Maugeri

International Conference on Case Histories in Geotechnical Engineering

The city of San Giuliano di Puglia (CB), located in the Molise region in Southern Italy, is prone to high seismic risk. For site characterisation of soil deep site investigations have been undertaken. Borings, static and dynamic in situ tests have been performed. Among them Cone Penetration Tests (CPT), Cross-Hole (C-H) Down-Hole (D-H) and Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, with the aim to evaluate the soil profile of shear waves velocity (Vs). Moreover the following laboratory tests were carried out on undisturbed samples: Oedometer tests, undrained Triaxial tests and Resonant Column tests. The available …

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Subject Areas Of Geotechnological Engineering (Ge) With Case Studies W.R.T. Indian Scenario. Case Study Of Recharging Surface Ground Water At Source, Ensuring No Contamination Of Water (A Ge Subject), B. N. Moolchandani Aug 2008

Subject Areas Of Geotechnological Engineering (Ge) With Case Studies W.R.T. Indian Scenario. Case Study Of Recharging Surface Ground Water At Source, Ensuring No Contamination Of Water (A Ge Subject), B. N. Moolchandani

International Conference on Case Histories in Geotechnical Engineering

Engineering Geology, Geophysics, Hydrology and Geochemistry are Main Benches of Geotechnical Engineering. Field Areas are:- Foundation Engineering, Excavation & Tunneling, Embankments and Dams, Improvement of Soft Soil Ground & Sub Grade System (Railways Highways), Disposal of Wastes (Land Fills, Tailings), Landslides, Earthquake-Geotechnology, Environmental Geotechnology Quality Evaluation of Existing Facilities, & Under Ground Construction. India has vast land area of about 3.4 million Sq.km. with in length of about 4000 km, with all fields of soil mechanics & rock mechanics. Case histories of all subjects of Geotechnical Engineering exists in India from north to south [Himalayan area in north to Indian …

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Design And Construction Of Granular Soil Columns For Ground Improvement Of Very Soft Soils For Road Embankments, Stavros A. Savidis, Frank Rackwitz, Maik Schüßler Aug 2008

Design And Construction Of Granular Soil Columns For Ground Improvement Of Very Soft Soils For Road Embankments, Stavros A. Savidis, Frank Rackwitz, Maik Schüßler

International Conference on Case Histories in Geotechnical Engineering

The first presented case history is the construction of a new federal road south of Berlin, Germany. An embankment has been designed to cross a region of very soft peat soil with underlying organic silt, sand and boulder clay, with a total length of about 140 m. Ground improvement using sand columns with a diameter of 0.6 m and a distance of 1.5 m were designed and applied to all regions with more than 2.5 m thickness of the organic soil layer. Geogrids were used in addition to the vertical sand columns to take into account the action of horizontal …

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Effectiveness Of Compaction Grout Piles In Improving Foundation Soils Of Existing Runway, Adel M. El-Kelesh, Tamotsu Matsui, Ken-Ichi Tokida Aug 2008

Effectiveness Of Compaction Grout Piles In Improving Foundation Soils Of Existing Runway, Adel M. El-Kelesh, Tamotsu Matsui, Ken-Ichi Tokida

International Conference on Case Histories in Geotechnical Engineering

Compaction grout piles were used to minimize the liquefaction potential of the foundation soils of Tokyo International Airport at the intersection area of the two runways A and B. The compaction grout piles were intermittent to treat only the liquefiable soil layers and of varying diameter to account for the variable condition of the treated soils. This paper describes the performed grouting works and presents improvement results for one of the grouting stages. The presented results reveal the effectiveness of the adopted design and procedure in improving the liquefiable soils. The paper also discusses the improvement results with emphasis being …

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Excavation For Underground Parking In Seville (Spain). Treatment With Reinforced Injections., Fernando De Casa Martín, F. Celis D’Amico, E. Echeverría Valiente, P. Chías Navarro, A. García Bodega Aug 2008

Excavation For Underground Parking In Seville (Spain). Treatment With Reinforced Injections., Fernando De Casa Martín, F. Celis D’Amico, E. Echeverría Valiente, P. Chías Navarro, A. García Bodega

International Conference on Case Histories in Geotechnical Engineering

For the accomplishment of a excavation of several levels, it is necessary the containment decision-making of the ground, and more in work situations under the phreatic level. The possible existing techniques in the market, they are various, each one of they with different applications. One of them is the technique of the treatment of the soil through the Technique of the reinforced injections. With this technique it is considered to accomplish a treatment of the perimeter of the zone to dig, in such a way that modifying the geotechnical characteristics of the soil, they could be obtained the required and …

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Foundation Work Of High Tv Tower In Collapsible Loess, Dimcho Evstatiev, Yordan Evlogiev, Mariana Nedelcheva Aug 2008

Foundation Work Of High Tv Tower In Collapsible Loess, Dimcho Evstatiev, Yordan Evlogiev, Mariana Nedelcheva

International Conference on Case Histories in Geotechnical Engineering

The TV tower in Rousse city is the highest in the Balkan area with its 198 m height. It is built up on loess with thickness of the collapsible zone about 15-16 m. The collapsibility has been overcome by excavation deepening up to 14.50 m, dynamic compaction of the excavation bottom with 7.0 tons tamper and building of a 4.5 m soil-cement cushion. A comparison between the calculated and measured settlement and of the soil base moisture content before and after TV tower construction is presented. Geodetic measurements have been made during and after the tower construction. Several calculation methods …

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Advanced, Modern And Innovative Technologies Used At The Houston Airport System (Stabilized Subgrades And Stabilized Bases), Adil Godiwalla Aug 2008

Advanced, Modern And Innovative Technologies Used At The Houston Airport System (Stabilized Subgrades And Stabilized Bases), Adil Godiwalla

International Conference on Case Histories in Geotechnical Engineering

The technical paper and presentation will give the audience at the conference an exhilarating surf ride of some of the leading edge of technologies in airport engineering. We have been using these advanced, modern and innovative technologies at the three airports in the Houston Airport System for the last twenty-three years. This should blend beautifully with the theme and title of the conference. The following topics among numerous others used should be enough to whet one’s appetite for advance, modern and innovative technologies in airport engineering. These project applications in the real world have made the Houston Airport System one …

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Geotechnical Characterization Of A Soft Clay Soil Subjected To A Preloading Embankment, Antonio Cavallaro, Salvatore Grasso, Valentina Lentini, Michele Maugeri Aug 2008

Geotechnical Characterization Of A Soft Clay Soil Subjected To A Preloading Embankment, Antonio Cavallaro, Salvatore Grasso, Valentina Lentini, Michele Maugeri

International Conference on Case Histories in Geotechnical Engineering

The paper presents the geotechnical characterization of a clay soil subjected to a preloading embankment for the construction of an industrial electronics building in the industrial area (STM M6) of Catania (Sicily, Italy). To determine the geological profile and the geotechnical characteristics of the soil, the site was well investigated by means of in situ and laboratory tests. The following in situ geotechnical tests were carried out: Borings, SPT, CPT, PLT and dynamic in situ tests have been performed. Among them Down-Hole (D-H), Cross-Hole (C-H), SASW and recently Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, with the aim …

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Lessons Learned From Closing Three Major Landfills – The Devil Really Is In The Details, R. Jeffrey Dunn Aug 2008

Lessons Learned From Closing Three Major Landfills – The Devil Really Is In The Details, R. Jeffrey Dunn

International Conference on Case Histories in Geotechnical Engineering

During the past 30 years the author has been involved in a number of landfill closure projects. No two were ever the same, and all were interesting. Three closure projects stand out for the level of effort involved, the rigor of regulatory review, and the issues that occurred during construction, a number of which could have been headed off during design. One site was a major hazardous waste disposal facility and Superfund site; the second, the Fresno Sanitary Landfill, was the oldest sanitary landfill for municipal solid waste in the United States, having opened in 1937 and is also a …

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A Field Test Study On Under Water Vacuum Preloading Method, A. K. L. Kwong, X. F. Han, L. G. Tham, P. K. K. Lee, W. B. Zhao Aug 2008

A Field Test Study On Under Water Vacuum Preloading Method, A. K. L. Kwong, X. F. Han, L. G. Tham, P. K. K. Lee, W. B. Zhao

International Conference on Case Histories in Geotechnical Engineering

Vacuum preloading technique incorporating prefabricated vertical drains is one of the most widely used ground improvement methods in the world for improving the engineering properties of soft clays. Although many successful on-shore cases on application of the technique have been reported, the effectiveness of applying the technique under water has not yet been investigated. Moreover, many technical and operation factors, that are playing important roles in vacuum consolidation, are also not yet fully understood. To study the feasibility of under water vacuum preloading, a large-scale field test was conducted. A 50 m by 50 m geo-membrane was laid under water …

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Settlement Behaviour Of A Cement-Stabilised Malaysian Clay, Chee-Ming Chan, Siti Hajarahani Abdullah Aug 2008

Settlement Behaviour Of A Cement-Stabilised Malaysian Clay, Chee-Ming Chan, Siti Hajarahani Abdullah

International Conference on Case Histories in Geotechnical Engineering

Soft clay soils often cause difficulties in construction operation with their low strength and low stiffness nature. However the engineering properties of these clay soils can be enhanced by adding ordinary Portland cement (OPC) for modification or stabilisation purposes. This paper describes the application of the cement stabilisation technique for improving the engineering properties of a soft Malaysian clay. The objectives of this study are two-fold: firstly, to study the settlement behaviour of the cement-treated clay using standard oedometers; and secondly, to explore the equal strain approach for predicting the settlement pattern of a stabilised columnar system for the clay. …

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Earthquake Mitigation By Blast Densification, Ulrich La Fosse, Theodore Von Rosenvinge Iv Aug 2008

Earthquake Mitigation By Blast Densification, Ulrich La Fosse, Theodore Von Rosenvinge Iv

International Conference on Case Histories in Geotechnical Engineering

This paper presents a case study of blast densification of a site underlain by a loose, saturated, natural sand deposit. Densification was performed to mitigate the risk of liquefaction from earthquake-induced ground vibrations. The work was implemented as part of the design-build construction of the Marine Corps Reserve Training Center at the Westover Air Reserve Base in Chicopee, Massachusetts. Following review of preliminary subsurface data at the site, the contractor retained a team to design and implement ground improvement by blast densification. The team, led by a geotechnical engineering firm, included a blaster, a driller, and a cone penetrometer testing …

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Soft Ground Improved By Rigid Vertical Piles. Experimental And Numerical Study Of Two Real Cases In France, M. Nuñez, D. Dias, R. Kastner, C. Poilpré Aug 2008

Soft Ground Improved By Rigid Vertical Piles. Experimental And Numerical Study Of Two Real Cases In France, M. Nuñez, D. Dias, R. Kastner, C. Poilpré

International Conference on Case Histories in Geotechnical Engineering

Settlements remain the major concern during the construction and along the life of a roadway embankment built over soft soils. A foundation ground reinforced by a system of rigid piles is an effective solution; it reduces and homogenizes the surface settlements. Rigid piles reinforcement system has been strongly developed in France for the last fifteen years, however, confrontations of several design used methods highlighted important variations in results. This results in implementing a French National Research Project A.S.I.RI. (Grounds Improvement by Rigid Inclusions) gathering construction companies, engineering and design departments, universities and research centers. This project aims to propose guidelines …

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